<template>
    <div class="goodsinfo-container">
        <!-- 小球 -->
        <transition
            @before-enter="beforeEnter"
            @enter="enter"
            @after-enter="afterEnter"
        >
        <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>
        <!-- 商品轮播图区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
              <div class="mui-card-content-inner">
                   <swiper :lunbotuList="lunbotuList" :isfull="true"></swiper>
              </div>
            </div>
		</div>
          <!-- 商品购买区域 -->
          <div class="mui-card">
				<div class="mui-card-header">{{ goodsinfo.title }}</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<p class="price">
                        <del>市场价:￥{{ goodsinfo.market_price }}</del>&nbsp;&nbsp;销售价<span class="now_price">￥{{ goodsinfo.sell_price }}</span>
                        </p>
                        <p>
                            购买数量：<number @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></number>
                        </p>
                        <P>
                            <mt-button type="primary" size="small">立即购买</mt-button>
                            <mt-button type="danger" size="small" @click="addToShopCar()">加入购物车</mt-button>
                        </P>
					</div>
				</div>
		 </div>
          <!-- 商品参数区域 -->
          <div class="mui-card">
				<div class="mui-card-header">商品参数</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<p>商品货号:{{ goodsinfo.goods_no }}</p>
                        <p>库存情况:{{ goodsinfo.stock_quantity }}件</p>
                        <p>上架时间:{{ goodsinfo.add_time }}</p>
					</div>
				</div>
				<div class="mui-card-footer">
                    <mt-button type="primary" size="large" @click="goDetails(id)">图文介绍</mt-button>
                    <mt-button type="danger" size="large" @click="goComment(id)">商品评论</mt-button>
                </div>
		 </div>
    </div>
</template>

<style lang="less" scoped>
    .mui-card-content-inner{
        padding:2px;
        P{
            padding-left:14px;
        }
    }
    .goodsinfo-container{
        background-color:#f5f5f5;
        overflow: hidden;
    }

    .now_price{
        color:red;
        font-size:16px;
        font-weight: bold;
    }

   .mui-card-footer{
        display: block;
        margin-bottom:50px;
        button{
            margin-top:5px;
        }
   }

//    小球
    .ball{
        width:15px;
        height:15px;
        border-radius:50%;
        background-color:red;
        z-index:199;
        position:absolute;
        top:370px;
        left:150px;
    }
</style>

<script>
//导入数字选择框组件
import number from '../subcomponents/goods_numberBox.vue';
//导入轮播图组件
import swiper from '../subcomponents/swiper.vue';
import { Toast } from "mint-ui";
export default {
    data(){
        return {
            id:this.$route.params.id,
            lunbotuList:[],//获取到的轮播图的信息
            goodsinfo:{},//获取到的商品的信息
            ballFlag:false,//购物车小球的状态标识符
            selectedCount:1,//保存用户选中的数量
        }
    },
    created(){
        this.getLunbotu();
        this.getGoodsInfo();
    },
    methods:{
        getLunbotu(){
            this.$http.get('https://www.sinya.online/api/getthumimages/' + this.id)
            .then(result =>{
                if(result.body.status === 0){
                    result.body.message.forEach(item => {
                        item.img = item.src;
                    });
                    this.lunbotuList = result.body.message;
                }else{
                    Toast('轮播图获取失败');
                }
            });
        },
        getGoodsInfo(){
          this.$http.get('https://www.sinya.online/api/goods/getinfo/' + this.id)
            .then(result =>{
                if(result.body.status === 0){
                    this.goodsinfo = result.body.message[0];
                }else{
                    Toast('商品信息获取失败');
                }
            });  
        },
        goDetails(id){
            //这是编程式导航
            this.$router.push({name:"goodsDetails",params:{id}});
        },
        goComment(id){
            this.$router.push({name:"goodscomment",params:{id}});
        },
        addToShopCar(){
            //添加到购物车
            this.ballFlag = !this.ballFlag;
            var goodsinfo = {
                id:this.id,
                count:this.selectedCount,
                price:this.goodsinfo.sell_price,
                selected:true
            }
            this.$store.commit('addToCar',goodsinfo);
        },
        beforeEnter(el){
            el.style.transform = "translate(0,0)";
        },
        enter(el,done){
            el.offsetWidth;
            //小球动画优化
            //获取小球在页面中的位置
            const ballPosition = this.$refs.ball.getBoundingClientRect();
            const badgePosition = document.getElementById('badge').getBoundingClientRect();
            const xDist = badgePosition.left - ballPosition.left;
            const yDist = badgePosition.top - ballPosition.top;

            el.style.transform = "translate(" + xDist + "px," + yDist +"px)";
            el.style.transition = "all 0.5s cubic-bezier(.4,-0.3,1,.68)";
            done();
        },
        afterEnter(el){
            this.ballFlag = !this.ballFlag;
        },
        getSelectedCount(count){
            this.selectedCount = count;
            // console.log("父组件拿到的数量为:" + this.selectedCount);
        }
    },
    components:{
        swiper,
        number
    }
}
</script>
